Automatic abradant-feed for buffing-machines.



J. F. GAIL & 0. H. FREDERICK. AUTOMATIC ABRADANT FEED FOR BUFFING MACHINES.

APPLICATION FILED JUNE 21, 1913. 1 1 O7 21 5.

Patented Aug. 11, 1914,

5 SHEETS-SHEET 1.

J. F. GAIL & G. H. FREDERICK.

AUTOMATIC ABRADANT FEED FOR BUFFING MACHINES.

. APPLICATION FILED JUNE 21, 1913. 1,107,215.

Patented Aug. 11, 1914.

6 SHEETS-SHEET 2.

J. P. GAIL & 0. H FREDERICK. AUTUMATIC ABRADANT FEED FOR BUFFING MACHINES.

APPLICATION FILED JUNE 21, 1913. 1,107,215, Patented Aug. 11, 1914.

5 SHEETS-SHEET 3.

J. F. GAIL & G. H. FREDERICK.

AUTOMATIC ABRADANT FEED FOR BUPFING MACHINES.

APPLICATION FILED JUNE 21, 1913.

1,107,21 5. Patented Aug. 11, 1914.

5 SHEETS-SHEET 4.

J. P. GAIL & (L6H. FREDERICK. AUTOMATIC ABRADANT FEED FOR BUFPING MACHINES.

APPLICATION IILED'JUNE 21, 1913.

Patented Aug. 11, 1914.

5 SHEETS-SHEET 5.

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UNITED sTA Es PATENT OFFICE.

JGHN F. GAIL AND CLARENCE H. FREDERICK, OF KENOSHA, WISCONSIN.

AUTOMATIC ABRADANT-FEED FOR BUFFING-MACHINFS.

Specification of Letters Patent.

Patented Aug. 11, 19 14.

Application filed June 21, 1913. Serial No. 774,948.

To all whom it may concern:

Be it known that we, JOHN F. GAIL and CLARENCE H. FREDERICK, citizens of the United States, residing at Kenosha, in the county of Kenosha and State of Wisconsin, have invented certain new and useful Improvements in Automatic Abradant-Feed for Buffing-Machines, of which the following is a specification.

Our invention relates to bufling machines for imparting a surface finish to long metallic objects such as brass tubes or the like which form parts of metal beds.

In such machines it is often found desirable to employ two buifing wheels arranged to act in succession upon the work, one of the wheels, usually called the cutting wheel, being charged with a relatively coarse abradant such as tripoli whereby to cut down the surface of the object and impart a preliminary polish thereto, while the second wheel, known as the coloring wheel, is charged if at all, with a fine rouge whereby to impart a final coloring or high polish to the object.

The principal object of this invention is the provision of automatically operating means whereby the abradant is supplied to the cutting wheel at regular intervals having a predetermined relation to the speed of the wheel while the same is acting upon the work. and also means to automatically throw out of operation the abradant feed during the time that the cutting wheel is running idly and the work is being acted upon by the coloring wheel.

In order that the invention may be readily understood by those skilled in the art the construction and operation of the same is described herein as an attachment to the butting machine forming the subject matter of United States Patent No. 957,198, issued May 10, 1910, to John F. Gail, to which patent reference is hereby made for a detailed description of operation of those parts of the machine not having to do directly with the invention itself, our improved automatic abradant feed being, however, capable of adaptation to various buffing machines. It will also be understood that in. such adaptation the constructional features of our abradant feed may be modified within a wide range without departure from the essence of the invention, wherefore the con struction of the patent referred to and that shown in the present drawings and the following deseription based thereon are to be taken in an illustrative and not in an unnecessarily limiting sense.

In the accompanying drawings: Figure 1 is a side elevation of certain parts of a buffing machine with our improved attachment; Fig. 2 is an end elevation of the same; Fig. 3' is a longitudinal section on an enlarged scale taken on the line 33 of Fig. 1; Fig. 1 is an end View from above of the abradant feed; Fig. 5 is a fragmentary side elevation 011 an enlarged scale of the left hand portion of Fig. 1; Fig.6 is a transverse section through the clutch being taken on line 66 of Fig. 1; Fig. 7 is a longitudinal section through the clutch taken on the line 77 of Fig. 6; andFig. 8 is an enlarged fragmentary side elevation of the tripping mechanism.

In the drawings the bufiing machine proper is shown as supported {upon the pedestal 11 having a laterally extending bearing bracket 12. Within suitable bearings 13 supported from the pedestal is j ournaled'a main shaft 14 driven by the belt 15 and carrying the cutting wheel 16 and the coloring wheel 17. Upon this shaft are mounted for free rotation and fixed against longitudinal movement collars l8 and 19 connected by a yoke 20 fixed upon a reciprocatory bar 21, the end of which bar bears against a cam (not shown) carried by a shaft 22 which is driven through a worm gear 23 by the pulley 24 from a belt 25. belts 15 and 25 being driven from the same source of power. By means of the mechanism just described the two bufling wheels 16 and 17 are rotated and at the same time reciprocated' transversely to their plane of rotation as fully described in the patent above referred to.

The work piece, here shown as a brass tube 26, is supported between arms 27 mounted upon the squared rod 28 of a Work carriage indicated generally at 29 and sliding upon guides30, 30, the carriage being driven by means of a rack 31 from a shaft "32, said shaft being alternately connected by means of a clutch 33 with the drive pulleys 34c and 35 driven respectively by the belts 36 and 37, by means of which the carriage is reciprocatedupon it's guides with the tube 26 held in contact first with the cutting wheel 16 until the preliminary polishing is completed and then shifted into contact with the coloring wheel 17 by means of the shifting mechanism shown in a general way only at 38 and comprising among other parts a ratchet wheel 39 and a notched wheel 40. The component elements of the carriage driving means and shifting mechanism form no art of the present invention and are descri ed in detailin the patent referred to.

An arm 41 of a bracket 42 extends upwardly at an inclination of substantially 45 and is provided in its upper face with a dovetail groove 43 within which is guided the dovetail tongue 44 of. an abradant carrier 45. This carrier is oblong in shape and of a size to accommodate easily a bar of abradant 46 such as tripoli, the tripoli being held within a holder 47 from which projects an interiorly threaded lug 48 while a spring 50 secured to the carrier by the screw 51 bears frictionally upon the abradant through a slot in the upper wall of the carrier. A chain 52 has one end attached to the abradant carrier at 53, the other end attached at 54 to an oscillatory drum, one of the drum portions 55 being keyed to a shaft 56, while the other portion 57 is loosely mounted upon said shaft. The portion 57 has fixed thereon a sprocket 58, and a collar 59 attached to the shaft 56 and bearing upon the sprocket 58, serves to hold the parts in assembled relation. One end of a chain 60 is attached at 61 to the sprocket wheel and passing around an idler 62 has its other end attached to the pin 63 of a crank disk 64 fixed upon the end of the shaft 22.

The two drum portions 55 and 57 are eccentrically bored at 65 and 66, the two bores being equally spaced from the drum axis and consequently adapted to aline one with the other as shown in Fig.7. A clutch pin 67 is mounted within the bore of the drum member 57 and is pressed in the direction of the drum member 5-5 by means of a spring 68 disposed within the housing 69, said spring tending to project the spring 67 into the bore 65 to clutch the two drum members 55 and 57 together. The pin 67 has in its side face a transverse slot 70 adapted to receive the beveled face 71 of a cam finger 72 which is pivoted at 73 and provided in turn with a transverse slot 74 in which slides a trip rod 75 having a stop collar 76 adjustably mounted thereon, the trip rod 75 has its lower end 77 abutting against 'a cam 78 fixed upon the face of the notched wheel 40. The cam 78 has high and low portions 79 and 80 and is mounted in i such fixed relation to the notched wheel 40 wheel 16 the high portion of the cam contacts with the rod 75 holding the cam finger i. 72 out of the notch 70 and permitting the pin 67 to be held by the spring 68 within the bore 65 of the drum portion 55 whereby the two portions of the drum are coupled together and shortly before the time when the tube 26 is shifted into contact with the coloring wheel 17 the high part of the cam 78 leaves the end of the rod 75 permitting the latter to drop and allowing the beveled face 71 of the canrfinger to engage within the notch 70 and retract the pin from the bore 65 so as to uncouple the drum portions.

Within the frame of the abradant carrier is journaled at 81 and 82 a screw spindle 83 traversing the threaded lug 48 and having loosely mounted upon its outer end an arm 84 carrying a roller 85 traveling upon the cam face 86 of the plate 87 bolted to the arm 41. Fixed upon the outer end of the spindle adjacent the arm 84 is a ratchet wheel 88 with which engages a pawl 89 pressed by the spring 90. A second spring 91 is attached at one end to the arm 84 and at the other end anchored to the carrier frame so that at each reciprocation of the abradant carrier the travel of the roller 85 upon the cam face 86 rotates the screw spindle to the extent of one notch of the ratchet 88 and upon the return of the carrier the pawl arm 84 and with it the pawl 89 is retracted by the spring 91 to permit the pawl to engage the next tooth of the ratchet whereby the bar of abradant 46 is gradually fed downward in the carrier 45 to compensate for its progressive consumption.

From the foregoing description it will be understood that while the tube 26 is being acted upon by the cutting wheel 16 the two drum portions 55 and 57 are coupled together by the pin 67 and at each transverse reciprocation of the shaft 14 the said drum is rotated in one direction by means of the chain 60 from the crank disk 64, such partial rotation of the drum being transmitted by the chain 52 to the abradant carrier which is thereby moved downwardly against the tension of the springs 92, 92 which are attached at one end to the carrier and at the other to the plate 87, such downward movement of the carrier serving to bring the lower end of the abradant 46 into contact with the cutting wheel 16 and also to partially rotate the spindle 83 to feed the abradant forward a. slight distancewithin said carrier. lVhen the crank pin 63 passes the dead center the abradant carrier is returned upwardly by its springs 92, 92 thereby unwinding its chain 52 from the drum portion 55, rotating said drum in a reverse direction assisted by the spring 93 which is attached to the drum portion 57 at 94 and to the bracket 42 at 95. It-will thus be seen that the abradant is fed into contact with the cutting wheel at each transverse reciprocation of the latter and that the intervals of such feed bear a predetermined constant relation to the speed of the wheel both being driven from the same source whereby the supply of abradant to the wheel is gaged by the work being done, and for a given number of feet traveled by the periphery of the cutting wheel in contact with the tube the abradant is applied to the wheel a uniform number of times as distinguished from the non-uniform results which would obtain if the abradant feed were operated by the carriage driving mechanism because of the varying lengths of tubing which the carriage is adapted to receive.

The machine illustrated is designed to reciprocate the tube 26 in contact with the cutting wheel 35 times and then to shift the tube into contact with the coloring wheel 17 with which it is reciprocated 14 times and then shifted into an inoperative position for removal and substitution by an other tube. The cam 78 is so designed that during the first 28 reciprocations of the tube in contact with the cutting wheel 16 the drum portions are clutched together and the abradant carrier is operated continuously, and during the last seven reiprocations of the tube in contact with the cutting wheel the drum portions are disconnected and the abradant feed is inactive, continuing inactive also during the entire time that the work is in contact with the coloring wheel and the cutting wheel is running idly.

If it is desired to employ more than the two wheels successively upon the work and to charge the different wheels with abradant, or where the two wheels are used and it is desired to apply rouge automatically to the coloring wheel, it will be obvious that the feeding mechanism may be duplicated and controlled independently by cams mounted in such relation to the work shifting mechanism as to render the several feeding devices operative and inoperative at predetermined times.

We claim:

1. The combination with a bufling wheel, of automatic means to apply an abradant thereto at intervals having a predetermined relation to the speed of the wheel, and means to render the abradant applying means inoperative after a predetermined number of applications, substantially as described.

2. The combination with a pair of bufiing wheels, a work holder, and means to shift the work holder from one wheel to the other, of automatic means to apply an abradant to one of the wheels at predetermined intervals while the work is in contact therewith, and means to automatically throw the abradant applying means out of operation during the time said wheel. is running idly and the work is in contact with the other wheel, substantially as described.

3. The combination with a pair of bufiing wheels, a work holder, and means to shift the work holder from one wheel to the other, of a reciprocatory al *adant carrier mounted. in operative relation to one of the wheels, means operating automatically to actuate the carrier to apply abradant to its wheel at intervals during a portion of the time that the work is applied thereto, and means to automatically throw the carrier out of operation before the work is shifted from said wheel to the other wheel, substantially as described.

4h. The combination with a pair of cutting and coloring wheels, a work holder, and means to shift the work holder from the cutting wheel to the coloring wheel, of an abradant carrier mounted in operative relation to the cutting wheel, means operating automatically to actuate the carrier to apply abradant to the cutting wheel at intervals having fixed relation to the speed of the wheel during a portion of the time that the work is in contact with said wheel, and means to automatically throw the carrier out of operation before the shifting of the work to the coloring wheel and to maintain the same out of operation during the time that the cutting wheel is. running idly, substantially as described.

5. The combination with a pair of cutting and coloring wheels, a work holder, and means to shift the work holder from the cutting wheel to the coloring wheel, of an abradant carrier mounted in operative relation to the cutting wheel, means operating automatically to actuate the carrier to apply abradant to the cutting Wheel at intervals having fixed relation to the speed of the wheel during a portion of the time that the work is in contact with said wheel, and means controlled by the shifting mechanism to automatically throw the carrier out of operation before the shifting of the work to the coloring wheel and to maintain the same out of operation during the time that the cutting wheel is running idly, substantially as described.

6. In a butting machine, the combination of a main shaft, a bu'fling wheel mounted thereon, means to axially reciprocate the wheel, an abradant carrier mounted to reciprocate in the plane of the wheel to and from said wheel, and common means to reciprocate the wheel and the carrier whereby to apply an abradant to the wheel at intervals having a predetermined relation to the speed of the wheel, substantially as described.

7. In a buffing machine, the combination of a main shaft. a cutting and a coloring wheel mounted thereon, means to axially reciprocate the wheels an abradant carrier mounted to reciprocate in the plane of the cutting wheelto and from said wheel, and common means to. rcciprocate the wheels and carrier whereby to apply the abradant to the cutting wheel only at intervals having a predetermined relation to the speed of said wheel, substantially as described.

8. In a bufiing machine, a main shaft, a pair of bufiing wheels mounted thereon, means to axially reciprocate the wheels comprising a cam shaft, driving means common to the two shafts, an abradant carrier mounted to reciprocate in the plane of one of the wheels to and from said wheel, a crank disk on the cam shaft, and a driving connection between the disk and carrier whereby to reciprocate the latter to apply an abradant at intervals to the cutting wheel, substantially as described.

In a buiiing machine, a main shaft, a pa1r of bufling wheels mounted thereon, means to axially reciprocate the wheels comprising a cam shaft, driving means common to the two shafts, an abradant carrier mounted to reciprocate in the plane of one of the wheels to and from said wheel, a crank disk on the cam shaft, and a driving connection between the disk and carrier comprising an oscillatory drum, a chain wound on the drum and connected to the carrier and crank disk respectively, whereby to reciprocate the carrier to apply an abradant to its wheel at intervals, substantially as described.

10. In a butting machine, the combination of a main shaft, a pair of cutting and coloring wheels mounted thereon, an abradant carrier mounted to reciprocate in the plane of and to and from the cutting wheel, a second shaft, a crank driven by the second shaft, and a driving connection between the crank and carrier comprising an oscillatory drum, a chain wound upon the drum and having its free end attached to the crank whereby the carrier is intermittently drawn toward the cutting wheel to apply'abradant thereto, and spring means to retract the carrier and to oscillate the drum in the opposite direction, substantially as described.

11. In a buffing machine, the combination of a main shaft, a pair of cutting and coloring wheels mounted thereon, an abradant :arrier mounted to reciprocate in the plane of and to and from the cutting wheel, a second shaft, a crank driven by the second shaft, and a driving connection between the crank and carrier comprising a two-part oscillatory drum, a chain wound upon one end of the drum and having its free end attached to the carrier, a second chain wound upon the other end of the drum and having its free end attached to the crank, a clutch connection between the two ends of the drum, a work holder, means to shift the work holder from the cutting wheel to the coloring wheel, and means controlled by the shifting mechanism to operate the clutch, whereby abradant is applied to the cutting wheel at intervals during the contact of the work with said wheel, and the application of abradant is intermitted during the time that the cutting wheel is running idly, substantially as described.

12. In a buffing machine, the combination with a cutting and coloring wheel, a work holder, and means to shift the work holder from one wheel to the other, of an abradant carrier mounted in operative relation to the cutting wheel, means operating automatically to actuate the carrier to apply abradant to its wheel at intervals during the application of the work thereto, and means to automatically throw the abradant feed out of operation when the cutting wheel is running idly comprising a clutch, a clutch rod operatively connected therewith, and a cam driven by the work shifting device and bearing on said rod, substantially as described.

13. In a butiing machine, the combination of a pair of cutting and coloring wheels, an abradant carrier mounted to reciprocate in the plane of the cutting wheel to and from said wheel, a winding drum having a chain mounted thereon, the free end of the chain attached to the abradant carrier, and means 'for driving the other end of the drum, the

drum divided transversely, a clutch interposed between the two portions of the drum, aolutch rod operatively connected therewith, a work holder, means to shift the work holder from one wheel to the other, and a cam driven by the work shifting device and bearing on said clutch rod, substantially as described.

141. In a butting machine, the combination of a pair of cutting and coloring wheels, an abradant carrier mounted to reciprocate in the plane of the cutting wheel to and from said wheel, a winding drum having a. chain mounted thereon, a free end of the chain attached to the abradant carrier, and means for driving the other end of the drum, the drum divided transversely, the two portions of the drum provided with alined eccentric bores, a transversely slotted spring pressed coupling pin mounted within the bore of one portion and projected by the spring into the bore of the other portion, a cam finger adapted to enter the slot, a clutch rod connected to the cam finger, a work holder, means to shift the work holder froln one wheel to the other, and a cam controlled by the work shifting device and bearing on said rod whereby the clutch is operated in timed relation to the shifting of the work from one wheel to the other, substantially as described. 1

15. In a bufiing machine, the combination with a pair of cutting and coloring wheels, a work holder, and means to shift the work holder from one wheel to the other, of a reciprocatory abradant carrier mounted in operative relation to the cutting wheel, an

abradant holder mounted within the carrier, a screw spindle journaled within the carrier in threaded engagement with the holder, a fixed cam surface arranged as a heliX about the axis of the spindle, an arm carried by the spindle and bearing upon the cam, means operating automatically to reciprocate the carrier and holder to apply abradant to the cutting wheel at intervals and to progressively feed the holder forward within the carrier, and means to automatically throw the carrier out of operation when the work is applied to the coloring wheel, substantially as described.

16. In a buffing machine, the combination with a pair of cutting and coloring wheels, a work holder, and means to shift the work holder from one wheel to the other, of a reciprocatory abradant carrier mounted in operative relation to the cutting wheel, an

abradant' holder mounted within the carrier, a screw spindle journaled within the carrier 1n threaded engagement with the holder, a

fixed cam surface arranged as a helix about the axis of the spindle, an arm carried by the spindle and bearing upon the cam, a ratchet and pawl connection between the arm and the spindle, means operating automatically to reciprocate .the carrier and holder to apply abradant to the cutting wheel at intervals and to progressively feed the holder forward within the carrier, and means to automatically throw the carrier out of operation when the work is applied to the coloring wheel, substantially as described.

JOHN F. GAIL. C. H. FREDERICK. Witnesses:

J. H. CANTWELL, JOHN BURNS. 

